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Title: In Situ TEM Study of Radiation Resistance of Metallic Glass–Metal Core–Shell Nanocubes

Abstract

Radiation damage can cause significantly more surface damage in metallic nanostructures than bulk materials. Structural changes from displacement damage compromise the performance of nanostructures in radiation environments such as nuclear reactors and outer space, or used in radiation therapy for biomedical treatments. As such, it is important to develop strategies to prevent this from occurring if nanostructures are to be incorporated into these applications. In this work, in situ transmission electron microscope ion irradiation was used to investigate whether a metallic glass (MG) coating mitigates sputtering and morphological changes in metallic nanostructures. Dislocation-free Au nanocubes and Au nanocubes coated with a Ni–B MG were bombarded with 2.8 MeV Au4+ ions. The formation of internal defects in bare Au nanocubes was observed at a fluence of 7.5 × 1011 ions/cm2 (0.008 dpa), and morphological changes such as surface roughening, rounding of corners, and formation of nanofilaments began at 4 × 1012 ions/cm2 (0.04 dpa). In contrast, the Ni–B MG-coated Au nanocubes (Au@NiB) showed minimal morphological changes at a fluence of 1.9 × 1013 ions/cm2 (0.2 dpa). Finally, the MG coating maintains its amorphous nature under all irradiation conditions investigated.

Authors:
ORCiD logo [1];  [2];  [1]
  1. Stanford Univ., CA (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)
OSTI Identifier:
1667399
Report Number(s):
SAND-2020-8605J
Journal ID: ISSN 1944-8244; 690052
Grant/Contract Number:  
AC04-94AL85000; NA-0003525
Resource Type:
Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 12; Journal Issue: 36; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
amorphous coatings; colloidal synthesis; core-shell nanoparticles; radiation stability; nanostructures

Citation Formats

Kiani, Mehrdad T., Hattar, Khalid, and Gu, X. Wendy. In Situ TEM Study of Radiation Resistance of Metallic Glass–Metal Core–Shell Nanocubes. United States: N. p., 2020. Web. doi:10.1021/acsami.0c10664.
Kiani, Mehrdad T., Hattar, Khalid, & Gu, X. Wendy. In Situ TEM Study of Radiation Resistance of Metallic Glass–Metal Core–Shell Nanocubes. United States. doi:10.1021/acsami.0c10664.
Kiani, Mehrdad T., Hattar, Khalid, and Gu, X. Wendy. Wed . "In Situ TEM Study of Radiation Resistance of Metallic Glass–Metal Core–Shell Nanocubes". United States. doi:10.1021/acsami.0c10664.
@article{osti_1667399,
title = {In Situ TEM Study of Radiation Resistance of Metallic Glass–Metal Core–Shell Nanocubes},
author = {Kiani, Mehrdad T. and Hattar, Khalid and Gu, X. Wendy},
abstractNote = {Radiation damage can cause significantly more surface damage in metallic nanostructures than bulk materials. Structural changes from displacement damage compromise the performance of nanostructures in radiation environments such as nuclear reactors and outer space, or used in radiation therapy for biomedical treatments. As such, it is important to develop strategies to prevent this from occurring if nanostructures are to be incorporated into these applications. In this work, in situ transmission electron microscope ion irradiation was used to investigate whether a metallic glass (MG) coating mitigates sputtering and morphological changes in metallic nanostructures. Dislocation-free Au nanocubes and Au nanocubes coated with a Ni–B MG were bombarded with 2.8 MeV Au4+ ions. The formation of internal defects in bare Au nanocubes was observed at a fluence of 7.5 × 1011 ions/cm2 (0.008 dpa), and morphological changes such as surface roughening, rounding of corners, and formation of nanofilaments began at 4 × 1012 ions/cm2 (0.04 dpa). In contrast, the Ni–B MG-coated Au nanocubes (Au@NiB) showed minimal morphological changes at a fluence of 1.9 × 1013 ions/cm2 (0.2 dpa). Finally, the MG coating maintains its amorphous nature under all irradiation conditions investigated.},
doi = {10.1021/acsami.0c10664},
journal = {ACS Applied Materials and Interfaces},
number = 36,
volume = 12,
place = {United States},
year = {2020},
month = {8}
}

Journal Article:
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This content will become publicly available on August 12, 2021
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